0001618: Build Clang with PGO - Rocky Linux BugTracker

ID	Project	Category	View Status	Date Submitted	Last Update

0001618	Rocky-Linux-9	clang	public	2022-12-29 03:41	2022-12-29 03:48

Reporter	Aliaksandr Zaitsau	Assigned To	Louis Abel
Priority	normal	Severity	minor	Reproducibility	N/A
Status	needinfo	Resolution	open

Summary	0001618: Build Clang with PGO
Description	LLVM supports building Clang with PGO (https://llvm.org/docs/HowToBuildWithPGO.html). Using PGO for compilers has a huge impact on compiler performance. E.g. many distros are already building GCC (which also supports PGO builds) with PGO. I think for the users would be beneficial to have faster Clang binaries. Locally I usually build my own Clang version. According to my tests, it could bring up to 20% performance. Additionally, you could consider using LLVM BOLT as an additional optimization step, but I guess it should be discussed in another issue after the PGO implementation.
Tags	No tags attached.

Louis Abel 2022-12-29 03:48 administrator ~0001948	Thank you for the report. This something we don't control. Ultimately upstream (red hat) would be the ones that would need to make this call. I would suggest opening a bug report as bugzilla.redhat.com (as you've done with Fedora https://bugzilla.redhat.com/show_bug.cgi?id=2156679) against CentOS Stream 9 if you wish to see pgo in Rocky Linux.

Date Modified	Username	Field	Change
2022-12-29 03:41	Aliaksandr Zaitsau	New Issue
2022-12-29 03:48	Louis Abel	Assigned To	=> Louis Abel
2022-12-29 03:48	Louis Abel	Status	new => needinfo
2022-12-29 03:48	Louis Abel	Note Added: 0001948